AD-10 is right handed rope clamp with a sturdy design. It is made from high quality materials making this rope ascender safe and durable. Its anti-slip, large hand grip is big enough to safely accommodate a hand in a thick glove. The protuberance on the lower side of the cam prevents it from capsizing and becoming stuck. The AD-10 Ascender is certified according to the European Norms EN 567 for sport use and EN 12841 type B for work at a height. In accordance with the first norm these ascenders are tested with low stretch and dynamic ropes from 8 mm (5/16") to 13 mm (1/2") and in accordance with the second they are tested with type A low stretch ropes from 9 mm (3/8") to 13 mm (1/2"). This ascender is also CE marked. The AD-10 is 7 7/8" (20cm) long, 3 9/16" (9cm) wide and 15/16" (2.3cm) deep.